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qemu: expand domain memory statistics with 'last-update' timestamp

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QEMU reports timestamp along with other memory statistics, but this information is not saved into domain statistics.
It could be useful to determine if the data reported is fresh or not.
Balloon statistics are not reported in hrf, so no modifications are made in qemu_monitor_text.c.

Signed-off-by: Derbyshev Dmitry <dderbyshev@virtuozzo.com>
This commit is contained in:
Derbyshev Dmitry 2016-06-01 20:07:07 +03:00 committed by Pavel Hrdina
parent 65bf044686
commit 200a40f94e
4 changed files with 20 additions and 11 deletions
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5
include/libvirt/libvirt-domain.h
View File

@ -609,11 +609,14 @@ typedef enum {
*/
VIR_DOMAIN_MEMORY_STAT_USABLE = 8,
/* Timestamp of the last update of statistics */
VIR_DOMAIN_MEMORY_STAT_LAST_UPDATE = 9,
/*
* The number of statistics supported by this version of the interface.
* To add new statistics, add them to the enum and increase this value.
*/
VIR_DOMAIN_MEMORY_STAT_NR = 9,
VIR_DOMAIN_MEMORY_STAT_NR = 10,
# ifdef VIR_ENUM_SENTINELS
VIR_DOMAIN_MEMORY_STAT_LAST = VIR_DOMAIN_MEMORY_STAT_NR

2
src/libvirt-domain.c
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@ -5991,6 +5991,8 @@ virDomainGetInterfaceParameters(virDomainPtr domain,
* to swap, corresponds to 'Available' in /proc/meminfo
* VIR_DOMAIN_MEMORY_STAT_ACTUAL_BALLOON:
* Current balloon value (in kb).
* VIR_DOMAIN_MEMORY_STAT_LAST_UPDATE
* Timestamp of the last statistic
*
* Returns: The number of stats provided or -1 in case of failure.
*/

22
src/qemu/qemu_monitor_json.c
View File

@ -1633,10 +1633,10 @@ qemuMonitorJSONGetBalloonInfo(qemuMonitorPtr mon,
* rates and/or whether data has been collected since a previous cycle.
* It's currently unused.
*/
#define GET_BALLOON_STATS(FIELD, TAG, DIVISOR) \
if (virJSONValueObjectHasKey(statsdata, FIELD) && \
#define GET_BALLOON_STATS(OBJECT, FIELD, TAG, DIVISOR) \
if (virJSONValueObjectHasKey(OBJECT, FIELD) && \
(got < nr_stats)) { \
if (virJSONValueObjectGetNumberUlong(statsdata, FIELD, &mem) < 0) { \
if (virJSONValueObjectGetNumberUlong(OBJECT, FIELD, &mem) < 0) { \
VIR_DEBUG("Failed to get '%s' value", FIELD); \
} else { \
/* Not being collected? No point in providing bad data */ \
@ -1707,20 +1707,22 @@ int qemuMonitorJSONGetMemoryStats(qemuMonitorPtr mon,
goto cleanup;
}
GET_BALLOON_STATS("stat-swap-in",
GET_BALLOON_STATS(statsdata, "stat-swap-in",
VIR_DOMAIN_MEMORY_STAT_SWAP_IN, 1024);
GET_BALLOON_STATS("stat-swap-out",
GET_BALLOON_STATS(statsdata, "stat-swap-out",
VIR_DOMAIN_MEMORY_STAT_SWAP_OUT, 1024);
GET_BALLOON_STATS("stat-major-faults",
GET_BALLOON_STATS(statsdata, "stat-major-faults",
VIR_DOMAIN_MEMORY_STAT_MAJOR_FAULT, 1);
GET_BALLOON_STATS("stat-minor-faults",
GET_BALLOON_STATS(statsdata, "stat-minor-faults",
VIR_DOMAIN_MEMORY_STAT_MINOR_FAULT, 1);
GET_BALLOON_STATS("stat-free-memory",
GET_BALLOON_STATS(statsdata, "stat-free-memory",
VIR_DOMAIN_MEMORY_STAT_UNUSED, 1024);
GET_BALLOON_STATS("stat-total-memory",
GET_BALLOON_STATS(statsdata, "stat-total-memory",
VIR_DOMAIN_MEMORY_STAT_AVAILABLE, 1024);
GET_BALLOON_STATS("stat-available-memory",
GET_BALLOON_STATS(statsdata, "stat-available-memory",
VIR_DOMAIN_MEMORY_STAT_USABLE, 1024);
GET_BALLOON_STATS(data, "last-update",
VIR_DOMAIN_MEMORY_STAT_LAST_UPDATE, 1);
ret = got;
cleanup:
virJSONValueFree(cmd);

2
tools/virsh-domain-monitor.c
View File

@ -375,6 +375,8 @@ cmdDomMemStat(vshControl *ctl, const vshCmd *cmd)
vshPrint(ctl, "actual %llu\n", stats[i].val);
if (stats[i].tag == VIR_DOMAIN_MEMORY_STAT_RSS)
vshPrint(ctl, "rss %llu\n", stats[i].val);
if (stats[i].tag == VIR_DOMAIN_MEMORY_STAT_LAST_UPDATE)
vshPrint(ctl, "last_update %llu\n", stats[i].val);
}
ret = true;